Dual-task repetition alters event-related brain potentials and task performance

作者：Kida Tetsuo^*; Kaneda Takeshi; Nishihira Yoshiaki

来源：Clinical Neurophysiology, 2012, 123(6): 1123-1130.

DOI：10.1016/j.clinph.2011.10.001

• P300
• Practice
• Learning
• Dual task
• Processing resource

Objective: We examined the modulation of event-related brain potentials (ERPs) and the accuracy of sensori-motor coordination on short-term repetition of the concurrent performance of a somatosensory discrimination (oddball) task and a visuo-motor tracking task. %26lt;br%26gt;Methods: The subjects concurrently performed visuomotor tracking and somatosensory oddball tasks. In the dual-task condition, the subjects performed the visuomotor tracking and somatosensory oddball tasks concurrently for about an hour. In the oddball-only condition, they performed just the oddball task for the same period. %26lt;br%26gt;Results: Tracking performance improved with task repetition. The amplitude of the P300 elicited by somatosensory stimulation in the oddball-only condition decreased significantly with task repetition, whereas in the dual-task condition, it showed a complex pattern of change. The earlier responses were decreased in amplitude in the dual-task condition compared to the oddball-only condition, and gradually decreased with task repetition in both conditions. %26lt;br%26gt;Conclusions: Dynamic changes in ERPs and task performance with dual-task repetition support the idea that dual-task repetition produces changes in resource allocation following the automation of stimulus processing in addition to so-called habituation. %26lt;br%26gt;Significance: This study also provides evidence for use of ERP amplitudes as physiological indices of functionally different types of resources.

• 出版日期2012-6